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Slide 1 - Teledyne Isco - Samplers_ Flow Meters_ Syringe Pumps by qingyunliuliu

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									Teledyne Isco, Inc.
   Georg Torstveit
     Who is Teledyne Isco, Inc. ?
• 1958 Instrumentation Specialties
  Company, Nebraska, USA
• 1972 Invented the automatic
  wastewater sampler
   – Timely for the Clean Water Act
     (1971)
• Today world leader in samplers
• Wide range of flow meters
• 500 employees
Teledyne Isco Manufacturing
Teledyne Isco Flow Laboratory
Teledyne Isco Flow Laboratory
         Why Flow Monitoring
• No Flow Monitoring – No Control.
• Environmental regulations require measurement of
  quantity (pollutant load), not only quality (concentration).
  Other uses are:
   • Water consumption.
   • Water contribution.
   • Plant operation and control.
   • Infiltration and inflow.
   • Flooding prevention.
   • Surface runoff.
   • Sewage overflow.
   • Rivers and streams.
How to measure flow?
       Isco
   Open Channel
Flow Measurement
    Handbook
   Contains tables with Min.,
 Norm., Max. values for various
    channel configurations
Flow Systems
 Open Channel Flow Measurement
       To measure flow rate (Q), we need...

                                     Q=AxV
1. The pipe or                    (continuity equation)
channel
geometry.
                                       3. The
2. The depth                           average
of the flow.                           velocity of the
                                       flow.
Open Channel Flow Measurement
  Methods for measuring flow in open
  channels:
   – Timed gravimetric (Stop watch)
   – Dye Dilution (Color, salt or isotope)
   – Slope-hydraulic radius (Manning)
   – Hydraulic structures (Weirs & Flumes)
   – Area velocity (Doppler, Radar,
     Electromagnetic)
TDI Flow Monitoring Technologies
• Level to Flow:
   – Pressure
   – Ultrasonic
   – Bubbler
• Area/ Velocity:
   – Continuous Wave Doppler
   – Pulsed Doppler
• Flowlink data handling
  software.
         Manning Formula
 Presented by Robert Manning in 1889 and
recommended for international use in 1936.
Hydraulic structures
 (primary device) -
 Weirs and Flumes
        Hydraulic Structure Method
             (Primary Device)
• Most commonly used         Flow Measurement Q = A x V,
                             V becomes a constant or linear.
  technique.
• Widely used for
  permanent applications.
• By introducing a structure
  with known shape and
  dimension, flow will be
  related to liquid level.
• High degree of accuracy.
Side Profile of a Weir
                   Flumes

• Converging
  section
• Throat section
• Diverging
  section
Parshall Flumes
Typical Flow Meter/Monitor
                     Flow
   Flow Meter        Monitor
                      Bubbler
An internal air compressor force a metered amount of air
through a bubble line submerged in the flow channel. By
measuring the pressure needed to force air bubbles out of
the line, the level of the water is accurately determined.
Typical bubbler installation
  4230 Bubbler Flow Meter
• IP 65 enclosure.
• Stationary/ portable.
• 0-3 m measuring
  range.
• 10 days battery
  capacity (Model 946).
• Level, flow rate,
  rainfall, sample and • 4-20 mA, relay, serial,
  water quality data.     GSM communication.
                        • Printer.

								
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